Subscribe & Unsubscribe
Subscribe new recipients to your mailing lists and unsubscribe the existing ones using the built-in subscribe & unsubscribe feature. You can use a POP3 mailbox, local file or HTTP remote file to get lists of recipients willing to subscribe or unsubscribe. This enables you to use either email messages coming from subscribers or text files produced by web forms to modify subscriptions automatically. Subscribe function is always invoked before Unsubscribe to ensure recipients willing to unsubscribe are removed with 100% certainty.